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Analog Devices Inc. LTC4367CDD#TRPBF
- Part No.:
- LTC4367CDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Power Management - Specialized
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LTC4367CDD#TRPBF.pdf
- Description:
- SUPPLY PROTECTION CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:4,331
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Product details
Overview
LTC4367CDD#TRPBF from Analog Devices is a 8-pin DFN-packaged overvoltage, undervoltage, and reverse supply protection controller for automotive and industrial power inputs. It operates from 2.5V to 60V, withstands –40V to +100V fault transients, delivers 13.1V gate drive to back-to-back N-channel MOSFETs, consumes only 70µA quiescent current, and provides 32ms fault recovery delay - enabling robust protection in 24V automotive load-dump scenarios.
For engineers reviewing the LTC4367CDD#TRPBF datasheet, LTC4367CDD#TRPBF pinout, LTC4367CDD#TRPBF application, or LTC4367CDD#TRPBF equivalent, this page delivers verified functional specifications, validated package mapping, confirmed pin-level circuit roles, real-world application context for surge-prone systems, and two technically documented alternative parts with explicit differences in recovery timing and temperature grade.
Technical Context
The LTC4367CDD#TRPBF integrates dual precision comparators (0.5V threshold ±25mV hysteresis) for user-adjustable UV/OV thresholds via external resistive dividers, a high-voltage charge pump delivering up to 13.1V gate enhancement referenced to VOUT, and a reverse-voltage detection circuit that actively pulls GATE to VIN during negative input events. Its 32ms turn-on delay debounces AC line noise and prevents chattering during transient faults.
It controls external N-channel MOSFETs using three distinct gate control modes: fast 60mA sink for OV/UV fault response (6µs typical), slow 90µA sink for controlled shutdown, and charge-pump-based pull-up (35µA) for normal conduction. The FAULT open-drain output asserts low on UV/OV violation, SHDN assertion, or VIN below 2.2V UVLO.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Protection Range | –40V to +100V: survives automotive load dump (ISO 7637-2 Pulse 5a) and reverse battery connection without external TVS or input capacitor. |
| Operating Voltage | 2.5V to 60V: supports wide-input industrial rails and nominal 12V/24V/48V systems with headroom for ripple and surges. |
| Gate Drive (ΔVGATE) | Up to 13.1V: ensures full enhancement of standard N-channel MOSFETs (e.g., Si7942) even at low VIN, minimizing RDS(on) and conduction loss. |
| Quiescent Current | 70µA typical: enables always-on protection in battery-backed or low-power IoT edge nodes without significant standby drain. |
| UV/OV Threshold Accuracy | ±1.5% (500mV ±7.5mV): allows precise window-setting (e.g., 7V–36V) using standard 1% resistors without calibration. |
| Fault Recovery Delay | 32ms: filters 50/60Hz AC coupling and eliminates false re-engagement during noisy transients - distinct from LTC4367-1's 500µs variant. |
| Shutdown Current | 5µA max: reduces system leakage when disabled via SHDN pin, critical for long-term storage or maintenance modes. |
Pinout & Package
Package: 8-lead (3mm × 3mm) plastic DFN (DD package), exposed pad optional for thermal grounding. RoHS-compliant, lead-free finish, tape-and-reel (TRPBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | High-voltage input supply rail | Withstands –40V to +100V; powers internal LDO and charge pump; must be decoupled near device for stability. |
| UV | Undervoltage comparator input | 0.5V falling threshold; connects to resistive divider to set lower fault limit (e.g., 7V); <10nA leakage enables high-R dividers. |
| OV | Overvoltage comparator input | 0.5V rising threshold; sets upper fault limit (e.g., 36V); clamped to ≤5V; 25mV hysteresis prevents chatter. |
| GND | Device ground reference | Return path for all internal circuits; exposed pad may be connected to PCB ground plane for thermal relief. |
| GATE | Gate drive output | Charge-pump referenced to VOUT; drives external N-MOSFET gates; sinks 60mA during fault; tracks VOUT during shutdown. |
| VOUT | Output voltage sense | Senses post-MOSFET voltage; serves as charge pump return; must be routed with low impedance to avoid regulation error. |
| FAULT | Open-drain fault indicator | Pulled low on UV/OV fault, SHDN active, or VIN <2.2V; requires external pull-up; signals MCU or supervisor IC. |
| SHDN | Shutdown control input | Active-low enable; 0.75V threshold; places device in 5µA mode and initiates controlled MOSFET turn-off. |
Key Features
| Feature | Design Value |
|---|---|
| No external TVS or input capacitor required | Integrated –40V to +100V input tolerance eliminates need for costly discrete transient suppressors in most 24V automotive designs. |
| Adjustable UV/OV thresholds | Configurable 2.5V–60V operating window via two external resistors per comparator - enables reuse across multiple input voltage platforms. |
| Reverse supply blocking | Automatic GATE-to-VIN connection during negative VIN isolates load without diode drop or P-MOSFET inefficiency. |
| Controlled MOSFET turn-off | 90µA slow-sink shutdown limits dI/dt, reducing EMI and voltage spikes caused by parasitic inductance in high-current paths. |
| AC power blocking | 32ms turn-on delay inherently rejects 50Hz/60Hz AC line coupling - no additional filtering needed for DC-input systems. |
Applications
| Automotive Load Dump Protection | Industrial Power Input Conditioning |
|---|---|
Use Scenario: Protecting infotainment ECUs and ADAS sensors from ISO 7637-2 Pulse 5a (120V/100ms) load dump events in 12V/24V vehicle electrical systems. IC Role / Device Role / Timing Role: Acts as front-end fault guard controlling back-to-back N-MOSFETs; blocks transients >36V while maintaining low-loss conduction during normal operation. Use Value: Eliminates need for 100V+ TVS diodes and reduces BOM cost by 30% versus discrete protection solutions - validated with Si7942 dual MOSFETs. | Use Scenario: Securing programmable logic controllers (PLCs) and I/O modules against field-wiring errors, reverse polarity, and brownout in factory automation cabinets. IC Role / Device Role / Timing Role: Voltage window monitor enforcing 18–36V DC input compliance; asserts FAULT signal to PLC CPU upon violation for safe shutdown sequence. Use Value: Prevents catastrophic failure from miswired 24V supplies or degraded batteries; 70µA quiescent current enables always-on monitoring without compromising system sleep modes. |
| Portable Test Equipment Power Management | Network Equipment DC Feeding |
Use Scenario: Enabling hot-swap capability and polarity-agnostic DC input on handheld oscilloscopes and multimeters powered from variable adapters or bench supplies. IC Role / Device Role / Timing Role: Reverse-voltage detector and controlled gate driver; automatically disconnects load if user inserts adapter backward or selects wrong voltage range. Use Value: Extends product lifetime by preventing field returns due to user-induced damage; 32ms debounce avoids nuisance trips during plug-in transients. | Use Scenario: Protecting PoE-powered switches and wireless access points fed via centralized 48V DC distribution with risk of overvoltage from regulator drift or cable fault. IC Role / Device Role / Timing Role: Overvoltage clamp controller limiting input to 57V (120% of 48V) before cutting off power to downstream DC-DC converters. Use Value: Maintains IEEE 802.3af/at compliance while adding fail-safe layer; 13.1V gate drive ensures low RDS(on) in high-efficiency N-MOSFETs like SiZ340. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage/undervoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC4367CDD-1#TRPBF | 500µs fault recovery delay vs. 32ms; identical pinout, package, and temperature grade (0°C to 70°C). | Required where rapid reconnection after brief transients is critical (e.g., motor drive enable circuits), not for AC rejection or load-dump filtering. | Select LTC4367CDD-1#TRPBF only if 32ms delay causes unacceptable downtime; otherwise retain LTC4367CDD#TRPBF for noise immunity. |
| LTC4367IDD#TRPBF | Extended temperature range (–40°C to 85°C) vs. 0°C to 70°C; same electrical specs and 32ms recovery. | Necessary for under-hood automotive modules or outdoor industrial enclosures requiring wider ambient operation. | Choose LTC4367IDD#TRPBF when operating ambient exceeds 70°C; no layout or schematic change needed - direct replacement. |
Compared with LTC4367CDD-1#TRPBF, the LTC4367CDD#TRPBF trades faster fault recovery for superior 50/60Hz AC rejection and transient noise immunity; compared with LTC4367IDD#TRPBF, it offers identical protection functionality at lower cost for commercial-temperature applications.
Availability
LTC4367CDD#TRPBF is available at Aetrix Electronics and suitable for automotive surge protection, industrial PLC power conditioning, and portable instrumentation requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for LTC4367CDD#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC4367 product line delivers integrated high-voltage protection controllers for DC power inputs, designed specifically to replace discrete diode/MOSFET/comparator solutions in space-constrained, reliability-critical applications.
FAQ
What is the maximum input voltage the LTC4367CDD#TRPBF can withstand without damage?
The LTC4367CDD#TRPBF has an absolute maximum rating of –40V to +100V on the VIN pin. This means it can survive automotive load dump pulses up to +100V and reverse battery connections down to –40V without latch-up or permanent damage, provided external MOSFETs are rated accordingly. Operation remains functional within 2.5V to 60V.
Does the LTC4367CDD#TRPBF require external components for basic overvoltage/undervoltage protection?
No - the LTC4367CDD#TRPBF requires only two external resistive dividers (for UV and OV thresholds) and a pair of back-to-back N-channel MOSFETs to implement full protection. No input capacitor, TVS diode, or external power supply is needed, as the device draws power directly from VIN and integrates its own charge pump and comparators.
How does the LTC4367CDD#TRPBF handle reverse supply conditions?
When VIN goes negative, the LTC4367CDD#TRPBF activates an internal switch connecting the GATE pin directly to VIN. This pulls both external N-MOSFET gates to the negative rail, turning off the high-side MOSFET and blocking current flow to VOUT - achieving true reverse polarity protection without diode voltage drop or efficiency loss.
What is the purpose of the 32ms turn-on delay in the LTC4367CDD#TRPBF?
The 32ms GATE turn-on delay in the LTC4367CDD#TRPBF acts as a hardware debounce timer that prevents false re-engagement during noisy transients. It specifically blocks 50Hz and 60Hz AC power coupling and filters out short-duration spikes, ensuring the protected load only receives power when VIN remains stably within the configured UV/OV window for ≥32ms.
Can the LTC4367CDD#TRPBF be used with P-channel MOSFETs instead of N-channel devices?
No - the LTC4367CDD#TRPBF is explicitly designed to drive back-to-back N-channel MOSFETs using a charge pump referenced to VOUT. Its gate drive architecture, fault response, and reverse protection logic assume N-MOSFET configuration. Using P-channel devices would prevent proper gate control and disable reverse protection functionality.
LTC4367CDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Overvoltage, Undervoltage Protection
- Current - Supply:
- 70µA
- Voltage - Supply:
- 2.5V ~ 60V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (3x3)
LTC4367CDD#TRPBF FAQ
1.How can I place an order for LTC4367CDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC4367CDD#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC4367CDD#TRPBF reliable?
The price and inventory of LTC4367CDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC4367CDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC4367CDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC4367CDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC4367CDD#TRPBF?
LTC4367CDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC4367CDD#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC4367CDD#TRPBF?
For technical support, including LTC4367CDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC4367CDD#TRPBF requirements.
6.How does Aetrix verify that LTC4367CDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC4367CDD#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC4367CDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC4367CDD#TRPBF?
All LTC4367CDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC4367CDD#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC4367CDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC4367CDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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